hex_str = "53FE510F1B00680100100058313720ED3A391600150E0d33392E39392E3135352E3131381F04353330318816"
#去除空格
hex_str = hex_str.replace(" ", "")
char_length = len(hex_str)
print("字符长度:", char_length)  # 输出: 72